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SN1202027 audible noise

Other Parts Discussed in Thread: SN1202027

Hola,

About the special part number device of SN1202027, we met audible noise issue and our phenomenon and debug step were describe as below:

About the audible noise, I have tried to adjust the compensate value as below and remove all of 10uF MLCC and add one 220uF POSCAP at output side

due to too many MLCC cap might causes acoustic noise, but we still can hear audible noise clearly (30cm between the tester and DUT), and the voltage

ripple is still too big for us (286mV). Can someone help to give some suggestion ? Thank you.

R7436: from 20K change to 51K

C2693: from 4.7nF change to 1nF

C2698: from 5pF change to 150pF